/*
所有mutation的名称常量
*/
export const ADD_TODO = 'add_todo' //添加todo
export const DEL_TODO = 'del_todo' //删除todo
export const SELECT_ALL_TODO = 'select_all_todo' //全选或全不选todo
export const CLEAR_ALL_COMPLETED = 'clear_all_completed' //清除已完成的todo
export const RECEIVE_TODOS = 'receive_todos' //接收todos
